Gabriel Genellina wrote:
En Fri, 13 Feb 2009 08:43:03 -0200, Peter Otten <__pete...@web.de>
escribió:
class Type(type):
... def __instancecheck__(self, other): return True
...
class A(metaclass=Type): pass
...
class B: pass
...
isinstance(B(), A)
True
See also
http://www.python.org/dev/peps/pep-3119/#overloading-isinstance-and-issubclass
Ah, ok. Isn't menctioned in the main documentation though.
Lack reported in http://bugs.python.org/issue5250
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